package com.atguigu.gulimail.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnume;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberResponseVo;
import com.atguigu.gulimail.feign.MemberFeignService;
import com.atguigu.gulimail.feign.ThirdPartFeignService;
import com.atguigu.gulimail.vo.UserLoginVo;
import com.atguigu.gulimail.vo.UserRegisterVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Controller
public class LoginController {

    @Autowired
    ThirdPartFeignService service;
    @Autowired
    StringRedisTemplate redisTemplate;
    @Autowired
    MemberFeignService memberFeignService;


    @GetMapping("login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute!=null) {
            return "redirect:http://gulimall.com:10001/list.html";
        }else {
            return "login";
        }

    }
    @PostMapping("sms/sendCode")
    @ResponseBody
    public R sendCode(@RequestParam("phone") String phone){
        //两个问题：
        //1。接口防刷
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)){
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis()-l<60000) {
                //60秒内不能在发
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(),BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }
        //2。验证码的校验 使用redis存储 key-phone value-code
        String substring = UUID.randomUUID().toString().substring(0, 5)+"_"+System.currentTimeMillis();
        //redis缓存验证码，防止同一个phone在60秒内再次发送验证码
        //验证码十分钟有效
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,substring,10, TimeUnit.MINUTES);
        service.send(phone,substring.split("_")[0]);
        return R.ok();
    }


    //todo 重定向携带数据，利用session原理，将数据放在session中，只要跳到下一个页面取出这个数据以后，session里面的数据就会删掉
    //todo 1。分布式下的session问题
    //RedirectAttributes 模拟重定向携带数据
    @PostMapping("/register")
    public String register(@Valid UserRegisterVo vo, BindingResult result, RedirectAttributes attributes){
        if (result.hasErrors()){
//            Map<String,String> errors = new HashMap<>();
//            result.getFieldErrors().stream().map(fieldError -> {
//                String field = fieldError.getField();
//                String code = fieldError.getDefaultMessage();
//                return errors.put(field,code);
//            });
            Map<String, String> collect = result.getFieldErrors().stream().collect(Collectors.toMap(
                    //两种写法 FieldError::getField
                    fieldError -> {
                        return fieldError.getField();}
                    , fieldError -> {
                return fieldError.getDefaultMessage();
            }));
            //校验出错，转发到注册页
            attributes.addFlashAttribute("errors",collect);
//            return "forward:/reg.html"; 用这种方式会报错，方法请求方式是post，而转发却转给get请求
            //转发是一个请求，重定向是两个请求
            return "redirect:/reg.html";
        }
        //调用远程服务进行注册
        //1。校验验证码
        String code = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)){
            if (code.equals(s.split("_")[0])){
                //删除验证码 ;令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());

                //验证码通过，开始注册
                R r = memberFeignService.register(vo);
                if (r.getCode()==0){
                    //成功
                    return "redirect:http://localhost:20000/login.html";
                }else {
                    Map<String,String> errors = new HashMap<>();
                    attributes.addFlashAttribute("errors",errors);
                    errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
                    return "redirect:http://localhost:20000/reg.html";
                }
            }else {
                Map<String,String> map = new HashMap<>();
                map.put("code","验证码错误");
                attributes.addFlashAttribute("errors",map);
                return "redirect:http://localhost:20000/reg.html";
            }
        }else {
            Map<String,String> map = new HashMap<>();
            map.put("code","验证码错误");
            attributes.addFlashAttribute("errors",map);
            return "redirect:http://localhost:20000/reg.html";
        }
    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes attributes, HttpSession session){
        R login = memberFeignService.login(vo);
        if (login.getCode()==0){
            MemberResponseVo data = login.getData("data", new TypeReference<MemberResponseVo>(){});
            session.setAttribute(AuthServerConstant.LOGIN_USER,data);
            return "redirect:http://gulimall.com:10001/list.html";
        }else {
            Map<String,String> map = new HashMap<>();
            map.put("msg",login.getData("msg",new TypeReference<String>(){}));
            attributes.addFlashAttribute("errors",map);
            return "redirect:http://localhost:20000/login.html";
        }

    }
}
